Mathematics
Senior High
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この式の計算の過程を教えてください！！
(3②) 全事象を信 赤の 1 と黒の 1 が隣り合うという事象を 4 赤の2 と黒の 2 が隣り合
うという事象を とする。 8
2(4n 万) =z(4Uぢ) =%(の一(4U
=ァ(の) -lz(4) + (5 -x(4n刀]
ここで z(4) =(万 =6!x2!
また, ②)から ヵz(4n妃=5!X2!x2!
ゆえに z( 4n万) =
導 22.51 1
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